1. Nuchal cord:a definition and a study associating placental location and nuchal cord incidence;Collins;J La State Med Soc,1991
2. Prenatal anomalies. Anomalies and curiosities of medicine;Gould,1896
3. Cord around the neck. Incidence and squeal;Crawford;Acta Pediátrica,1962
4. Cord around the neck syndrome;Peesay;BMC Pregnancy Childbirth,2012
5. Nuchal cord and perinatal outcome;Shrestha;Kathmandu Univ Med J,2007